fastening is an essential element in the construction of any building, construction, engineering and pipeline communication. the construction is impossible without fasteners. no subject was without a full, professional installation.fastening is very diverse. elements of fasteners very much. only a small number of, screws, screws, bolts, screws, nuts, washers, a rear threaded washers, pins, rivets, дюбеля, анкера.some equipment are created by international standards (this is the case, first of all, метрического fasteners: bolts, screws, nuts, washers, etc.). it allows to bridge the gap between the bolt and the nut from different manufacturers. proven fastening (metric fastening) is widely applied in the field of pipeline valves.
正在翻譯中..
![](//zhcntimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)